<template>
	<div class="icons">
		<swiper :options="swiperOption" v-if="showSwiper">
			<swiper-slide v-for="(page,index) of pages" :key="index">
				<div class="icon" v-for="item of page" :key="item.id">
					<div class="icon-img">
						<img class="icon-img-content" :src="item.imgUrl" />
					</div>
					<p class="icon-desc">{{item.desc}}</p>
				</div>
			</swiper-slide>
			<!-- Optional controls -->
			<div class="swiper-pagination"  slot="pagination"></div>
		</swiper>
	</div>
</template>

<script>
	export default {
		name:'HomeIcons',
		props: {
			list: Array
		},
		data() {
			return {
				swiperOption: {
					pagination: '.swiper-pagination', //显示小圆点
					loop: true,//循环
					autoplay:false //防止图标区域自动轮播
				},
			}
		},
		computed: {
			pages () {
				const pages = []
				this.list.forEach((item,index) =>{
					const page = Math.floor(index/8)
					if(!pages[page]){
						pages[page] = []
					}
					pages[page].push(item)
				})
				return pages
			},
			//实现加载页面时显示第一张轮播图，而不是最后一张，因为组件的显示是有初始化为空数组的list决定的
			showSwiper () {
				return this.list.length
			}
		},
	}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
@import '~styles/mixins.styl'
.icons >>> .swiper-container
	height:0
	padding-bottom:50%
.icons
	margin-top:.1rem
	.icon
		position:relative
		overflow:hidden
		float:left
		width:25%
		height:0
		padding-bottom:25%
		.icon-img
			position:absolute
			top:0
			left:0
			right:0
			bottom: .44rem
			box-sizing:border-box
			padding:.1rem
			.icon-img-content
				height: 100%
				display:block
				margin:0 auto
		.icon-desc
			position:absolute
			left:0
			right:0
			bottom: 0
			line-height:.44rem
			height:.44rem
			color:$dartTextColor
			text-align:center
			/*完成字符串太长省略显示为...的功能*/
			ellipsis()
</style>
